Salvage apparatus and method
US4078509A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 27, 1976 |
| Grant date | Mar 14, 1978 |
| Priority date | — |
| Expiry date | May 27, 1996 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB63C7/10
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
A salvage apparatus which includes a collapsible bag which has a top and a ottom. A relief valve is mounted at the top of the bag for expelling air from the top of the bag, and a relief valve is mounted at the bottom of the bag for expelling water from the bottom of the bag. A fitting is mounted to the bag for introducing gas or water into the bag so that the rates of descent and ascent of the bag can be controlled. A method of recovering a submerged object includes filling the bag with water, attaching the bag to the submerged object, introducing gas into the bag until the object commences to ascend, and venting air from the top of the bag as the bag ascends to control the rate of ascent.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.